diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Analysis/ScalarEvolution.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp index 2a8088dc445..f34549ae52b 100644 --- a/llvm/lib/Analysis/ScalarEvolution.cpp +++ b/llvm/lib/Analysis/ScalarEvolution.cpp @@ -1268,7 +1268,11 @@ const SCEV *ScalarEvolution::getTruncateExpr(const SCEV *Op, } if (!hasTrunc) return getAddExpr(Operands); - UniqueSCEVs.FindNodeOrInsertPos(ID, IP); // Mutates IP, returns NULL. + // In spite we checked in the beginning that ID is not in the cache, + // it is possible that during recursion and different modification + // ID came to cache, so if we found it, just return it. + if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP)) + return S; } // trunc(x1*x2*...*xN) --> trunc(x1)*trunc(x2)*...*trunc(xN) if we can @@ -1284,7 +1288,11 @@ const SCEV *ScalarEvolution::getTruncateExpr(const SCEV *Op, } if (!hasTrunc) return getMulExpr(Operands); - UniqueSCEVs.FindNodeOrInsertPos(ID, IP); // Mutates IP, returns NULL. + // In spite we checked in the beginning that ID is not in the cache, + // it is possible that during recursion and different modification + // ID came to cache, so if we found it, just return it. + if (const SCEV *S = UniqueSCEVs.FindNodeOrInsertPos(ID, IP)) + return S; } // If the input value is a chrec scev, truncate the chrec's operands. |
